WO1993017274A1 - Pistolet a lubrifiant - Google Patents

Pistolet a lubrifiant Download PDF

Info

Publication number
WO1993017274A1
WO1993017274A1 PCT/GB1993/000379 GB9300379W WO9317274A1 WO 1993017274 A1 WO1993017274 A1 WO 1993017274A1 GB 9300379 W GB9300379 W GB 9300379W WO 9317274 A1 WO9317274 A1 WO 9317274A1
Authority
WO
WIPO (PCT)
Prior art keywords
lubricant
pump
cylinder
gun
gun according
Prior art date
Application number
PCT/GB1993/000379
Other languages
English (en)
Inventor
Derek Sydney Izzard
Original Assignee
Derek Sydney Izzard
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB929204126A external-priority patent/GB9204126D0/en
Priority claimed from GB929221207A external-priority patent/GB9221207D0/en
Application filed by Derek Sydney Izzard filed Critical Derek Sydney Izzard
Publication of WO1993017274A1 publication Critical patent/WO1993017274A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N3/00—Devices for supplying lubricant by manual action
    • F16N3/10—Devices for supplying lubricant by manual action delivering grease
    • F16N3/12—Grease guns
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N13/00—Lubricating-pumps
    • F16N13/02—Lubricating-pumps with reciprocating piston
    • F16N13/06—Actuation of lubricating-pumps
    • F16N2013/063—Actuation of lubricating-pumps with electrical drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N2270/00—Controlling
    • F16N2270/60—Pressure
    • F16N2270/62—Limit

Definitions

  • the invention relates to lubricant guns, that is to say devices from which a lubricant such as grease or oil is dispensed under pressure to lubricate bearing surfaces and the like of machinery.
  • a lubricant gun has a reciprocating piston pump which forces lubricant supplied to the pump from a lubricant container to a dispensing outlet.
  • the piston pump may be driven by an electric motor.
  • a lubricant gun of the kind having a reciprocating piston pump which forces lubricant supplied to the pump from a lubricant container to an outlet, characterised by a lubricant inlet to the pump disposed in the cylinder at or near the outermost end of the piston travel and controlled by a one-way valve.
  • a lubricant outlet from the pump will preferably also be disposed at the outermost end of the cylinder.
  • the pump will be a double-acting reciprocating piston pump.
  • a single double-headed piston may be employed or alternatively a pair of free pistons may be employed. In the latter case the pistons may be moved outwardly under the action of a cam or eccentric and may be returned by resilient means, e.g compression springs.
  • the lubricant gun may comprise an electrically operated pump.
  • the pump may be driven by a DC electric motor which can be powered from an electric battery, e.g. an accumulator of a vehicle or machine to be serviced or by a battery, e.g. a rechargeable dry-cell battery, contained perhaps in the lubricant gun or in a separate powerpack carried by the user on a waist band.
  • an electric battery e.g. an accumulator of a vehicle or machine to be serviced
  • a battery e.g. a rechargeable dry-cell battery
  • the lubricant gun may be in the form of a hand-held tool comprising a lubricant container, which may be under pressure from resilient means such as a spring in conventional manner, reciprocating piston pump means, an electric motor driving the pump, means for delivering the lubricant to a dispensing outlet nipple and means connecting the electric motor to an electric battery or accumulator.
  • the device will preferably comprise a pressure relief valve in the lubricant delivery system, and preferably a pressure switch will be provided to shut off, and thus protect, the electric motor in the event of pressure overload in the system.
  • Figure 1 is a general side view of a portable lubricant gun, showing the pump driving mechanism in dotted lines;
  • Figure 2 is a cross-sectional side view through a preferred form of reciprocating piston pump
  • Figure 3 is a cross-sectional view of the pump of Figure 2 and taken on the line 3-3 of Figure 2;
  • Figure 4 is a cross-sectional side view, similar to that of Figure 2, through a second embodiment of reciprocating piston pump, and
  • Figure 5 is a cross-sectional side view, similar to that of Figure 2, through a third embodiment of reciprocating piston pump.
  • a high pressure lubricant gun e.g. for dispensing grease or oil, of the kind comprising a reciprocating piston pump which forces lubricant supplied to the pump from a lubricant container or reservoir to a dispensing outlet.
  • a lubricant gun 1 comprises a generally cylindrical lubricant container or receptacle 2 adapted, in conventional fashion, to hold a cartridge of grease or oil (not shown) and to apply pressure to the lubricant by means of a spring or the like (not shown) to force the lubricant to a pump 8 described below.
  • the container 2 is secured to a pump body 9 by means of a releasable coupling, (not shown) e.g. screw- threaded means.
  • the pump body 9 contains a reciprocating piston pump more particularly described below with reference to Figures 2 and 3.
  • the pump in the body 9 is actuated by means of an electric motor 3 which is mounted on the pump body 9 and a handle 4 is mounted on the casing of the electric motor to assist in the handling and manipulation of the gun.
  • a flexible lubricant delivery hose or pipe 6 extends from the pump body and is terminated in conventional fashion by a dispensing outlet or connector 7.
  • the pump 8 comprises a body 9 made for example from aluminium and having a substantially centrally disposed cylindrical cavity 14 defining a cylinder 13, containing a cylindrical member 15 defining at its opposite ends an opposed pair of pistons 16,17.
  • the cylindrical member 15 is a snug fit in the cylinder 13 and is slidable axially therein.
  • the cylindrical member 15 is formed centrally with a recess 34 snugly containing an assembly consisting of a circular drive member or eccentric 31 and a bearing 32 mounted eccentrically on a drive shaft 30 journalled in bearing 33 in the body 9 whereby rotation of the shaft 30 causes the pistons 16,17 to reciprocate in the cylinder 13.
  • Lubricant from the container 2 enters the pump body 9 through an inlet cavity 10 and communicates with an opposed pair of cylinder inlets 18,19 disposed at the outer ends of the cylinder 13, via respective non-return valves 11,12, each of which comprises a ball urged against a seat by spring means in conventional manner.
  • Lubricant leaves the cylinder 13 via under pressure through a pair of outlets 21 disposed at the outer ends of the cylinder 13 and exits the body 9 through a common outlet 23 via a common non-return or shuttle valve 22 consisting of a ball which is movable under lubricant pressure to seat in either one of an opposite pair of orifices communicating with the outlets 21.
  • the outlet 23 communicates with hose 6 in conventional fashion.
  • a pressure relief valve 24 is provided in the outlet downstream of the shuttle valve 22 to vent lubricant back to the container 2 via an outlet 25 in the event of over ⁇ pressure in the system.
  • the pump arrangement described in Figure 4 is very similar to that described above with reference to Figures 2 and 3 with the exception that the cylindrical member 15 is replaced by a pair of free pistons I5a,15b which are held in contact with the eccentric assembly 31,32 by compression springs 35.
  • the one way valves 11,12 are replaced by piston controlled lubricant inlet ports 36, and to avoid or mitigate the formation of vacuum in the cylinder 13 above the pistons, the sides of the pistons near to their tops are cut away at 37 to form flow paths for the lubricant so that the ports 36 are uncovered or opened early in the pump cycle.
  • the sides of the pistons may be formed with small grooves extending to the tops of the pistons to form the lubricant flow paths.
  • lubricant may be fed to the cylinder 13 through inlet ports extending longitudinally through the cylindrical member 15 and fed with lubricant e.g. from a centrally disposed opening in the side of the cylindrical member 15 and through a registering inlet port in the body 9 and opening into the cylinder 13.
  • the inlet ports in the member 15 would open at each end into the cylinder through the piston tops and would be controlled by an opposed pair of one-way valves, e.g. ball valves, disposed in the cylindrical member 15.
  • the pump arrangements described above permit a lubricant gun to be operated with a modest power consumption and thus permits the gun to be operated as a self powered hand tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

Pistolet à lubrifiant du type comprenant une pompe à piston à mouvement alternatif (13, 15) qui pousse de force du lubrifiant alimentant la pompe à partir d'un récipient (2) de lubrifiant, vers un orifice de sortie (7); le pistolet se caractérisant par le fait qu'un orifice d'entrée (18, 19) de lubrifiant dans la pompe est disposé dans le cylindre (13) au niveau du point extrême de la course du piston, ou à proximité de ce point, et est commandé par une soupape (11, 12, 36, 37).
PCT/GB1993/000379 1992-02-26 1993-02-24 Pistolet a lubrifiant WO1993017274A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB929204126A GB9204126D0 (en) 1992-02-26 1992-02-26 Grease gun
GB9204126.8 1992-02-26
GB9221207.5 1992-10-08
GB929221207A GB9221207D0 (en) 1992-10-08 1992-10-08 Grease gun

Publications (1)

Publication Number Publication Date
WO1993017274A1 true WO1993017274A1 (fr) 1993-09-02

Family

ID=26300381

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1993/000379 WO1993017274A1 (fr) 1992-02-26 1993-02-24 Pistolet a lubrifiant

Country Status (2)

Country Link
AU (1) AU3571193A (fr)
WO (1) WO1993017274A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108533471A (zh) * 2017-03-03 2018-09-14 苏州宝时得电动工具有限公司 手持式高压清洗机
US11708822B2 (en) 2015-11-20 2023-07-25 Positec Power Tools (Suzhou) Co., Ltd. Handheld high-pressure cleaning machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB136926A (en) * 1919-01-07 1919-12-31 David Kirkwood Improvements in Double-acting Force Pumps for Feeding Oil.
GB601451A (en) * 1945-01-16 1948-05-06 Uni Gun Lubricating Equipment Improvements in or relating to lubricant feeding apparatus
US2461332A (en) * 1944-12-01 1949-02-08 John T Leonard Lubricant compressor
US3291350A (en) * 1963-11-05 1966-12-13 Jerry P Malec Fluid pump
GB1152732A (en) * 1965-12-14 1969-05-21 Wanner Ag Grease Gun.
US4257540A (en) * 1978-10-26 1981-03-24 Mcneil Corporation Hand-held battery-powered grease gun
US5105912A (en) * 1990-12-11 1992-04-21 Heister Michael J Portable battery-powered grease gun

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB136926A (en) * 1919-01-07 1919-12-31 David Kirkwood Improvements in Double-acting Force Pumps for Feeding Oil.
US2461332A (en) * 1944-12-01 1949-02-08 John T Leonard Lubricant compressor
GB601451A (en) * 1945-01-16 1948-05-06 Uni Gun Lubricating Equipment Improvements in or relating to lubricant feeding apparatus
US3291350A (en) * 1963-11-05 1966-12-13 Jerry P Malec Fluid pump
GB1152732A (en) * 1965-12-14 1969-05-21 Wanner Ag Grease Gun.
US4257540A (en) * 1978-10-26 1981-03-24 Mcneil Corporation Hand-held battery-powered grease gun
US5105912A (en) * 1990-12-11 1992-04-21 Heister Michael J Portable battery-powered grease gun

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11708822B2 (en) 2015-11-20 2023-07-25 Positec Power Tools (Suzhou) Co., Ltd. Handheld high-pressure cleaning machine
USRE49589E1 (en) 2015-11-20 2023-07-25 Positec Power Tools (Suzhou) Co., Ltd Pump unit and handheld high pressure washer
CN108533471A (zh) * 2017-03-03 2018-09-14 苏州宝时得电动工具有限公司 手持式高压清洗机

Also Published As

Publication number Publication date
AU3571193A (en) 1993-09-13

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